Main Fuse Removal/Installation

Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0] ).
Insert a tape-wrapped flathead screwdriver into the service hole in the position shown in the figure.

Fig 1: Identifying Main Fuse Cover And Service Hole
Courtesy of MAZDA MOTORS CORP.
Move the flathead screwdriver in the direction of the arrow (1) shown in the figure, pull up the main fuse cover in the direction of the arrow (2) shown in the figure, and detach the main fuse cover tab from the main fuse.

Fig 2: Disconnecting Main Fuse Cover Tab
Courtesy of MAZDA MOTORS CORP.
Remove the main fuse cover.
Remove the nuts.

Fig 3: Identifying Main Fuse Cover
Courtesy of MAZDA MOTORS CORP.

Fig 4: Front Wiring, Engine Wiring Harness, Main Fuse And Nut With Torque Specification
Courtesy of MAZDA MOTORS CORP.
Remove the main fuse.
Install in the reverse order of removal.